[issue31978] make it simpler to round fractions

[Wolfgang Maier]

Wolfgang Maier <wolfgang.maier at biologie.uni-freiburg.de> added the comment:

ok, I agree with you that the returned type should not change with the value of an argument. I simply didn't think one vs two argument versions here, but in terms of three different code branches where one returns int already.
Maybe 'slight' was the wrong wording - think of it as 'easy to revert' then :)

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue31978>
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